Partial discharge detection device and detection method

Abstract

The invention discloses a partial discharge detection device and a detection method, relates to the technical field of partial discharge detection, and aims to solve the problems that in the prior art, when partial discharge detection is carried out, a partial discharge detection device and an inspection robot need to be controlled at the same time to complete detection of different detection sites, the operation difficulty is increased, and the detection time is shortened; the detection device comprises a test cylinder, a partial discharge detection part and a base, the partial discharge detection part is arranged at one end of the test cylinder; the test cylinder can move on the base towards or away from the detection site. According to the detection device, on the premise that the position of the partial discharge detection device does not need to be moved, partial discharge detection of a plurality of detection sites at different heights on the to-be-detected electric appliance is completed, manual operation steps are reduced, the operation difficulty is reduced, and the detection efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of partial discharge detection, and particularly to a partial discharge detection device and a detection method. Background Art

[0002] Electrical appliances in the distribution room, such as the power distribution cabinet to be detected, the electrical panel cabinet, etc., need to be regularly inspected and detected to facilitate timely discovery of abnormalities and prevent accidents.

[0003] The existing partial discharge detection device is set on the inspection robot. The inspection robot transports the partial discharge detection device to the front of the electrical appliance to be detected, and performs partial discharge detection on the electrical appliance to be detected.

[0004] When it is necessary to perform partial discharge detection on different detection sites of the electrical appliance to be detected, it is necessary to move the inspection robot to transport the partial discharge detection device to different detection sites. When detecting detection sites at different heights, the inspection robot is also required to have corresponding lifting ability.

[0005] For partial discharge detection, it is necessary to control both the partial discharge detection device and the inspection robot simultaneously to complete the detection of different detection sites, which increases the operation difficulty and detection time; in addition, it is also necessary to increase the capital investment in the mobile inspection robot.

[0006] Therefore, it is necessary to design a new detection device and detection method to complete the partial discharge detection of different detection sites of the electrical appliance to be detected without moving the inspection robot. Summary of the Invention

[0007] In view of the above analysis, the present invention aims to provide a partial discharge detection device to solve the problem that when performing partial discharge detection on different detection sites of the same electrical appliance to be detected in the prior art, it is necessary to move the inspection robot to transport the partial discharge detection device to different detection sites, which increases the operation difficulty and reduces the detection efficiency.

[0008] The object of the present invention is mainly achieved through the following technical solutions:

[0009] On the one hand, the present invention provides a partial discharge detection device, which includes a test cylinder, a partial discharge detection part and a base; the partial discharge detection part is arranged at one end of the test cylinder; the test cylinder can move towards or away from the detection site on the base.

[0010] Further, the partial discharge detection part includes a housing and a detection probe; one end of the housing is sleeved on the other end of the second insulating cylinder opposite to the first insulating cylinder; the detection probe is arranged at the other end of the housing.

[0011] Further, a telescopic spring is provided between one end of the housing and the second insulating cylinder.

[0012] Further, a base is further included, and the base includes a rack which is arranged on the base.

[0013] Further, a driving assembly is further included. The driving assembly includes a fixing frame, a motor and a gear. The fixing frame is arranged at the other end of the first insulating cylinder; the motor is fixed on the fixing frame, and the gear is arranged at the output end of the motor; the gear is arranged opposite to the rack;

[0014] Wherein, the motor drives the gear to rotate, and the gear moves on the rack, driving the first insulating cylinder to move on the base.

[0015] Further, the base further includes a front end limit switch and a rear end limit switch;

[0016] When the first insulating cylinder moves to the front end of the rack, the fixing frame triggers the front end limit switch; when the first insulating cylinder moves to the rear end of the rack, the fixing frame triggers the rear end limit switch.

[0017] Further, the test cylinder includes a first insulating cylinder, a second insulating cylinder and a rocker arm assembly; the partial discharge detection part is arranged at one end of the second insulating cylinder away from the first insulating cylinder;

[0018] Wherein, one end of the rocker arm assembly is rotatably arranged on the first insulating cylinder, the other end of the rocker arm assembly is arranged on the second insulating cylinder, and the other end of the rocker arm assembly is relatively rotatable with the second insulating cylinder; when one end of the rocker arm assembly rotates, the other end of the rocker arm assembly drives the second insulating cylinder to generate a lifting displacement, so that the partial discharge detection part corresponds to detection sites at different heights.

[0019] Further, the rocker arm assembly includes a power assembly which is arranged in the first insulating cylinder; one end of the rocker arm assembly is connected to the output end of the power assembly.

[0020] Further, the rocker arm assembly further includes a fixing member, a connecting shaft rod and a synchronous belt. The fixing member is arranged on the second insulating cylinder; the fixing member includes a first fixing end and a second fixing end which are arranged oppositely;

[0021] One end of the connecting shaft rod is arranged at the output end of the power assembly, and the other end of the connecting shaft rod is arranged on the first fixing end through a bearing; one end of the synchronous belt is arranged at the output end of the power assembly through a first synchronous pulley, and the other end of the synchronous belt is arranged on the second fixing end through a second synchronous pulley.

[0022] On the other hand, the present invention further includes a partial discharge detection method, which uses the above device to detect the partial discharge of the electrical appliance to be detected. The specific steps are as follows:

[0023] Step 1: Design n detection sites, where n≥2;

[0024] Step 2: The partial discharge detection device completes the detection of the first detection site;

[0025] Step 3: Adjust the position of the test cylinder, and the partial discharge detection device completes the detection of the second detection site;

[0026] Step 4: Repeat Step 3 until the partial discharge detection of the nth detection site is completed.

[0027] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0028] (1) For the partial discharge detection device provided by the present invention, the test cylinder can move towards or away from the detection site on the base. Without moving the inspection robot, the test cylinder can be moved to the detection site of the electrical appliance to be detected for partial discharge detection.

[0029] (2) For the partial discharge detection device provided by the present invention, the test cylinder is divided into a first insulating cylinder, a second insulating cylinder and a rocker arm assembly. One end of the rocker arm assembly is rotatably fixed to the first insulating cylinder, and the other end of the rocker arm assembly drives the second insulating cylinder to perform a circular motion to change the height of the second insulating cylinder. At the same time, the other end of the rocker arm assembly is relatively rotatable with the second insulating cylinder. During the movement of the second insulating cylinder, the second insulating cylinder is kept in a horizontal state, that is, one end of the second insulating cylinder is always directly facing the electrical appliance to be detected, ensuring that the partial discharge detection part is directly facing the detection site, and realizing the correspondence of the partial discharge detection part to the detection sites at different heights of the electrical appliance to be detected for partial discharge detection of the detection sites at different heights.

[0030] (3) For the partial discharge detection device provided by the present invention, when the height of the second insulating cylinder is changed by the rocker arm assembly, the distance between one end of the second insulating cylinder and the detection end face of the electrical appliance to be detected also increases. To ensure that the partial discharge detection part contacts the detection end face and perform partial discharge detection on detection sites at different heights, the present invention provides a rack on the base. By moving the first insulating cylinder on the rack of the base, the distance value between the partial discharge detection part arranged at the front end of the second insulating cylinder and the electrical appliance to be detected is changed. When the partial discharge detection device is set in front of the electrical appliance to be detected, by adjusting the position of the first insulating cylinder on the base, the partial discharge detection part is brought into contact with the surface of the electrical appliance to be detected, completing the detection of the first detection site. When it is necessary to detect the second detection site at a different height, change the rising or falling angle of the rocker arm assembly, and correspondingly move the partial discharge detection part to the height of the second detection site. Then, adjust the position of the first insulating cylinder on the base so that the partial discharge detection part contacts the second detection site on the electrical appliance to be detected, completing the detection of the second detection site. By analogy, through the adjustment of the angle of the test cylinder and the adjustment of the first insulating cylinder at different positions on the base, the partial discharge detection of detection sites at different heights is realized.

[0031] Other features and advantages of the present invention will be described in the following specification, and some will become obvious from the specification, or be understood by implementing the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the structures specifically pointed out in the written specification and the drawings. Brief Description of the Drawings

[0032] The drawings are only used to illustrate the specific invention and are not considered as a limitation to the present invention. Throughout the drawings, the same reference signs represent the same components.

[0033] Figure 1 One of the schematic structural diagrams of the partial discharge detection device provided in Embodiment 1 of the present invention;

[0034] Figure 2 Another schematic structural diagram of the partial discharge detection device provided in Embodiment 1 of the present invention;

[0035] Figure 3 Schematic structural diagram of the partial discharge detection part in the partial discharge detection device provided in Embodiment 1 of the present invention;

[0036] Figure 4 One of the schematic structural diagrams of the partial discharge detection device provided in Embodiment 2 of the present invention;

[0037] Figure 5 Another schematic structural diagram of the partial discharge detection device provided in Embodiment 2 of the present invention;

[0038] Figure 6 Schematic top view of the partial discharge detection device provided in Embodiment 2 of the present invention;

[0039] Figure 7 Schematic diagram III of the structure of the partial discharge detection device provided in Embodiment 2 of the present invention;

[0040] Figure 8 Schematic diagram IV of the structure of the partial discharge detection device provided in Embodiment 2 of the present invention;

[0041] Figure 9 Schematic diagram V of the structure of the partial discharge detection device provided in Embodiment 2 of the present invention;

[0042] Figure 10 Explosion diagram of the partial discharge detection device provided in Embodiment 2 of the present invention;

[0043] Figure 11 Schematic diagram of the structure of the partial discharge detection device provided in Embodiment 3 of the present invention;

[0044] Figure 12 Flow chart of the partial discharge detection method provided in Embodiment 4 of the present invention.

[0045] Reference numerals:

[0046] 1 - test cylinder; 11 - first insulating cylinder; 12 - second insulating cylinder; 13 - rocker assembly; 131 - power assembly; 132 - fixing member; 1321 - first fixed end; 1322 - second fixed end; 133 - connecting rod; 134 - bearing; 135 - synchronous belt; 136 - first synchronous pulley; 137 - second synchronous pulley; 138 - flexible telescopic cylinder;

[0047] 2 - partial discharge detection part; 21 - housing; 22 - detection probe; 23 - telescopic spring; 24 - trigger switch;

[0048] 3 - base; 31 - rack; 32 - front end limit switch; 33 - rear end limit switch;

[0049] 4 - drive assembly; 41 - fixing bracket; 42 - motor; 43 - gear;

[0050] 5 - rotating assembly; 51 - rotating motor; 52 - turntable. Detailed implementation manners

[0051] The following will specifically describe the preferred invention of the present invention in conjunction with the accompanying drawings, where the accompanying drawings form a part of the present invention and are used together with the invention of the present invention to explain the principle of the present invention.

[0052] Embodiment 1

[0053] This embodiment provides a partial discharge detection device, see Figure 1 and Figure 2 , including a test cylinder 1, a partial discharge detection unit 2 and a base 3; the partial discharge detection unit 2 is arranged at one end of the test cylinder 1; the test cylinder 1 can move towards or away from the detection site on the base 3.

[0054] In this embodiment, before placing the partial discharge detection device in front of the device to be detected, by controlling the position of the test cylinder 1 on the base 3, the partial discharge detection unit 2 is brought into contact with the detection site of the electrical appliance to be detected.

[0055] In the embodiment, as Figure 3 shown, the partial discharge detection unit 2 includes a housing 21 and a detection probe 22.

[0056] In the embodiment, one end of the housing 21 is arranged at one end of the test cylinder 1; the detection probe 22 is arranged at the other end of the housing 21.

[0057] In the embodiment, a telescopic spring 23 is arranged between one end of the housing 21 and the test cylinder 1.

[0058] When the housing 21 touches the surface of the electrical appliance to be detected, the housing 21 activates the trigger switch 24, and the trigger switch 24 controls the detection probe 22 to start working. The detection probe 22 starts to detect the partial discharge at the detection site of the electrical appliance to be detected. At the same time, the telescopic spring 23 has a certain deformation ability, which can adjust the relative relationship between the partial discharge detection unit 2 and the detection site to be detected, and ensure that when the partial discharge detection unit 2 detects the detection site to be detected, it can be perpendicular to the detection site to be detected.

[0059] In the embodiment, a rack 31 is arranged on the base 3.

[0060] In the embodiment, a driving assembly 4 is further included. The driving assembly 4 includes a fixing frame 41, a motor 42 and a gear 43; the fixing frame 41 is arranged at the other end of the test cylinder 1; the motor 42 is fixed on the fixing frame 41, and the gear 43 is arranged at the output end of the motor 42; the gear 43 is arranged opposite to the rack 31;

[0061] Among them, the motor 42 drives the gear 43 to rotate, and the gear 43 moves on the rack 31, driving the test cylinder 1 to move on the base 3.

[0062] In the embodiment, the base 3 further includes a front end limit switch 32 and a rear end limit switch 33,

[0063] When the test cylinder 1 moves to the front end of the rack 31, the fixed frame 41 triggers the front end limit switch 32; when the test cylinder 1 moves to the rear end of the rack 31, the fixed frame 41 triggers the rear end limit switch 33.

[0064] Embodiment 2

[0065] The partial discharge detection device described in this embodiment, as Figure 4 and Figure 5 shown, on the basis of the partial discharge detection device described in Embodiment 1, the test cylinder 1 includes a first insulating cylinder 11, a second insulating cylinder 12 and a rocker arm assembly 13; the partial discharge detection part 2 is arranged at one end of the second insulating cylinder 12 far from the first insulating cylinder 11;

[0066] Wherein, one end of the rocker arm assembly 13 is rotatably arranged on the first insulating cylinder 11, the other end of the rocker arm assembly 13 is arranged on the second insulating cylinder 12, and the other end of the rocker arm assembly 13 can rotate relative to the second insulating cylinder 12; when one end of the rocker arm assembly 13 rotates, the other end of the rocker arm assembly 13 drives the second insulating cylinder 12 to generate a lifting displacement, so that the partial discharge detection part 2 corresponds to detection sites at different heights.

[0067] Before placing the partial discharge detection device in front of the electrical appliance to be detected, the height value of the first insulating cylinder 11 relative to the electrical appliance to be detected is fixed. Without moving the partial discharge detection device, by controlling the circular motion of the rocker arm assembly 13, the relative distance between the second insulating cylinder 12 and the first insulating cylinder 11 is changed, so as to change the height of the second insulating cylinder 12 relative to the electrical appliance to be detected, and the technical effect of detecting the detection sites at different heights of the electrical appliance to be detected is achieved.

[0068] The partial discharge detection device provided by the present invention divides the test cylinder 1 into a first insulating cylinder 11, a second insulating cylinder 12 and a rocker arm assembly 13. One end of the rocker arm assembly 13 is rotatably fixed on the first insulating cylinder 11, and the other end of the rocker arm assembly 13 drives the second insulating cylinder 12 to perform circular motion to change the height of the second insulating cylinder 12; at the same time, the other end of the rocker arm assembly 13 can rotate relative to the second insulating cylinder 12. During the movement of the second insulating cylinder 12, the second insulating cylinder 12 is kept in a horizontal state, that is, one end of the second insulating cylinder 12 is always directly facing the electrical appliance to be detected, ensuring that the partial discharge detection part 2 is directly facing the detection site, so as to correspond the partial discharge detection part 2 to the detection sites at different heights of the electrical appliance to be detected, so as to perform partial discharge detection on the detection sites at different heights. As Figures 7 to 9 shown, Figure 7 is a schematic structural diagram of the first insulating cylinder 11, the second insulating cylinder 12 and the rocker arm assembly 13 when the second insulating cylinder 12 does not move upward or downward;Figure 8 Schematic diagram of the structures of the first insulating cylinder 11, the second insulating cylinder 12 and the rocker arm assembly 13 when the second insulating cylinder 12 undergoes a downward displacement; Figure 9 Schematic diagram of the structures of the first insulating cylinder 11, the second insulating cylinder 12 and the rocker arm assembly 13 when the second insulating cylinder 12 undergoes an upward displacement.

[0069] In the embodiment, as Figure 6 shown, the rocker arm assembly 13 includes a power assembly 131 which is arranged inside the first insulating cylinder 11; one end of the rocker arm assembly 13 is connected to the output end of the power assembly 131.

[0070] In the embodiment, as Figure 10 shown, the rocker arm assembly 13 further includes a fixing member 132 which is arranged on the second insulating cylinder 12;

[0071] The fixing member 132 includes a first fixing end 1321 and a second fixing end 1322 which are oppositely arranged.

[0072] In the embodiment, the rocker arm assembly 13 includes a coupling rod 133. One end of the coupling rod 133 is arranged at the output end of the power assembly 131, and the other end of the coupling rod 133 is arranged on the first fixing end 1321 through a bearing 134.

[0073] In the embodiment, the connecting assembly further includes a synchronous belt 135. One end of the synchronous belt 135 is arranged at the output end of the power assembly 131 through a first synchronous pulley 136, and the other end of the synchronous belt 135 is arranged on the second fixing end 1322 through a second synchronous pulley 137.

[0074] The coupling rod 133 is arranged at the first fixing end 1321 of the fixing member 132, and the synchronous belt 135 is arranged at the second fixing end 1322 of the fixing member 132. The two are oppositely arranged and act together. The coupling rod 133 is used as a rigid transmission member. When the output end of the power assembly 131 rotates clockwise or counterclockwise, one end of the coupling rod 133 rotates along with the output end, causing the other end of the coupling rod 133 to generate an upward or downward angular displacement, driving the fixing member 132 arranged at the other end of the coupling rod 133 to rise or fall. The second insulating cylinder 12 rises or falls along with the fixing member 132, realizing the rise or fall of the partial discharge detection part 2 and detecting the detection sites at different heights of the electrical appliance to be detected. The coupling rod 133 ensures the stable connection between the power assembly 131 and the fixing member 132, guarantees the reliability of the mechanical structure, can effectively transmit power, has relatively high requirements for transmission accuracy, and provides stable support when the lifting part rises or falls to different heights, ensuring the efficient operation of the entire system.

[0075] When the connecting rod 133 drives the other end of the second insulating cylinder 12 to rise or fall, in order to prevent one end of the second insulating cylinder 12 from moving downward under the action of gravity, a synchronous belt 135 is provided at the second fixed end 1322 of the fixing member 132. When the output end of the power assembly 131 rotates, the first synchronous pulley 136 can move relative to the output end of the power assembly 131, and the first synchronous pulley 136 does not rotate synchronously with the output end, and the synchronous belt 135 does not rotate. When the connecting rod 133 drives the other end of the second insulating cylinder 12 to rise or fall, the other end of the synchronous belt 135 drives the other end of the second insulating cylinder 12 to rise or fall. The second synchronous pulley 137 is clamped at the second fixed end 1322, and the synchronous belt 135 meshes with the second synchronous pulley 137. When one end of the second insulating cylinder 12 has a tendency to move downward, a counterclockwise movement tendency will be generated at the second fixed end 1322 of the fixing member 132 provided at the other end of the insulating cylinder. At this time, under the pulling action of the synchronous belt 135, the clockwise pulling force is transmitted to the second fixed end 1322 through the second synchronous pulley 137, and the two acting forces are balanced, so that the second insulating cylinder 12 is kept horizontally arranged, and no point of the insulating cylinder moves downward, ensuring that the partial discharge detection part 2 remains perpendicular to the point to be detected.

[0076] At the same time, the synchronous belt 135 is a flexible transmission component, which can absorb a certain amount of vibration and shock during the power transmission process, playing a role of buffering and shock absorption, reducing the vibration and noise during the operation of the equipment, and improving the stability and comfort of the equipment.

[0077] In the embodiment, the power assembly 131 includes a driving motor and a double-shaft reverse reducer. The double-shaft reverse reducer is arranged at the output end of the driving motor; both the driving motor and the double-shaft reverse reducer are prior arts.

[0078] In the embodiment, a flexible telescopic cylinder 138 is arranged outside the rocker assembly to protect the outer wall of the rocker assembly.

[0079] In the embodiment, as Figure 4 、 Figure 5 and Figure 7 The partial discharge detection device further includes a driving assembly 4. The driving assembly 4 includes a fixing frame 41, a motor 42 and a gear 43. The fixing frame 41 is arranged at the other end of the first insulating cylinder 11; the motor 42 is fixed on the fixing frame 41, and the gear 43 is arranged at the output end of the motor 42; the gear 43 is arranged opposite to the rack 31;

[0080] Wherein, the motor 42 drives the gear 43 to rotate, and the gear 43 moves on the rack 31, driving the first insulating cylinder 11 to move on the base 3.

[0081] The first insulating cylinder 11 can move on the rack 31 of the base 3 to change the distance value between the partial discharge detection part 2 arranged at the front end of the second insulating cylinder 12 and the electrical appliance to be detected; when the partial discharge detection device is placed in front of the electrical appliance to be detected, by adjusting the position of the first insulating cylinder 11 on the base 3, the partial discharge detection part 2 is brought into contact with the surface of the electrical appliance to be detected, and the detection of the first detection site is completed; when it is necessary to detect the second detection site at a different height, the angle of the rocker arm assembly 13 rising or falling is changed, and correspondingly the partial discharge detection part 2 is moved to the height of the second detection site, and then the position of the first insulating cylinder 11 on the base 3 is adjusted so that the partial discharge detection part 2 is in contact with the second detection site on the electrical appliance to be detected, and the detection of the second detection site is completed. By analogy, through the adjustment of the angle of the test cylinder 1 and the adjustment of different positions of the first insulating cylinder 11 on the base 3, the partial discharge detection of detection sites at different heights is realized.

[0082] The embodiment also includes a main control board;

[0083] The main control board receives a signal to control the motor 42 to rotate counterclockwise. The motor 42 changes from rotational motion to linear motion through the meshing between the gear 43 and the rack 31. When the motor 42 rotates, the test cylinder 1 moves forward along the rack 31. When the partial discharge detection part 2 touches the object to be measured, the trigger switch 24 is triggered and sends a low-level electrical signal to the main control board. After receiving the low-level electrical signal from the front-end detection switch, the main control board stops the movement of the motor 42 and starts the partial discharge detection operation. After the partial discharge detection operation is completed, the driving motor 42 starts to act, and the partial discharge detection part 2 can be lifted and lowered in the vertical direction, and the partial discharge data is tested again and the partial discharge data is stored. By repeating the operation, the detection of multiple detection sites at different heights is completed; when the partial discharge data detection of detection sites at different heights is completed, the motor 42 is controlled to rotate clockwise, and the test cylinder 1 starts to retract. When the rear end of the fixing frame 41 on the first insulating cylinder 11 touches the rear-end limit switch 33, the bottom limit switch sends a low-level electrical signal to the main control board. After receiving this signal, the main control board stops the movement of the motor 42, and then the test cylinder 1 retracts successfully.

[0084] Embodiment 3

[0085] The partial discharge detection device described in this embodiment, as Figure 11 , on the basis of the partial discharge detection device described in Embodiment 2, further includes a rotating assembly 5, and the rotating assembly 5 is arranged at one end of the first insulating cylinder 11; the rotating assembly 5 includes a rotating motor 51 and a turntable 52, the turntable 52 is arranged at the output end of the rotating motor 51, and one end of the rocker arm assembly 13 is fixed on the turntable 52;

[0086] One end of the first insulating cylinder 11 is provided with a rotating cylinder body, the turntable 52 is clamped inside the rotating cylinder body, the rotating motor 51 drives the turntable 52 to rotate, and one end of the swing arm assembly 13 is driven by the turntable 52 to rotate. That is, driven by the rotating motor 51, the second insulating cylinder 12 can perform a circular motion with the first insulating cylinder 11 as the center.

[0087] The rotating motor 51 adopts a stepper motor in the prior art and can control the rotation angle.

[0088] When the partial discharge detection device in this embodiment performs partial discharge detection on one end face of the electrical appliance to be detected, on the basis of not moving the partial discharge detection device, the detection of multiple detection points on one end face is completed.

[0089] Embodiment 4

[0090] This embodiment provides a partial discharge detection method, as Figure 12 shown, using the partial discharge detection device of Embodiment 1, Embodiment 2 or Embodiment 3 to perform partial discharge detection, which specifically includes the following steps:

[0091] Step 1: Design n detection points, n≥2;

[0092] S1.1 Obtain the length value of the swing arm assembly 13, that is, the maximum radius of the second insulating cylinder 12 during circular motion, and also the maximum range that the partial discharge detection unit 2 can detect;

[0093] S1.2 Obtain the size information of the end face to be detected;

[0094] The partial discharge detection device is vertically arranged with respect to the end face to be detected of the electrical appliance to be detected. A rectangular coordinate system is established with the point where the device projects onto the end face of the electrical appliance to be detected as the origin, and the range information of the end face to be detected on the rectangular coordinate system is determined;

[0095] S1.3 Determine the first detection point; use the origin as the first detection point;

[0096] S1.4 Determine the second detection point;

[0097] On the end face to be detected, draw a first circle with the first detection point as the center and r as the radius, and select multiple first points in the first circle as the second detection points; the position information of the first points is within the range information interval on the rectangular coordinate system;

[0098] S1.5 Repeat step S1.4, and set different radius values according to the detection needs to determine the nth detection point;

[0099] Step 2: The partial discharge detection device completes the detection of the first detection point;

[0100] Step 3. The partial discharge detection device completes the detection of the second detection site;

[0101] S3.1 Determine the first rotation angle of the output end of the power component 131 according to the second detection site; according to the radius r and the length of the rocker arm assembly 13, use the Pythagorean theorem to determine the first angle that one end of the rocker arm assembly 13 corresponding to the second detection site needs to rotate, and the output end of the power component 131 rotates the first angle;

[0102] S3.2 Determine the azimuth angle of the second detection point on the rectangular coordinate system, and determine the second rotation angle that the output end of the rotation motor 51 needs to rotate according to the azimuth angle; under the rotation of the rotation motor 51, make the partial discharge detection part 2 be arranged opposite to the second detection site;

[0103] S3.3 The motor 42 drives the test cylinder 1 on the rack 31 towards the second detection site until it contacts the second detection site, and completes the detection of the second detection site;

[0104] S3.4 Repeat step S3.2 and step S3.3 until the detection of multiple second detection sites is completed.

[0105] Step 4. Repeat step 3 until the partial discharge detection of the nth detection site is completed.

[0106] For the detection method described in this embodiment, different detection sites are designed according to the maximum range that the partial discharge detection part can detect and the surface to be detected of the electrical appliance to be detected. Without moving the partial discharge detection device as a whole, the lifting of the rocker arm assembly and the movement of the position of the test cylinder on the base are controlled, so that the partial discharge detection part can detect the detection sites at different positions. In actual operation, the detection of all detection sites on the surface to be detected can be independently completed through the preset detection program steps, greatly reducing the detection time, saving labor costs, and improving the detection efficiency.

[0107] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A partial discharge detection device, characterized in that: The invention comprises a test cylinder (1), a partial discharge detection part (2) and a base (3); the partial discharge detection part (2) is arranged at one end of the test cylinder (1); and the test cylinder (1) can move on the base (3) towards or away from a detection site.

2. The partial discharge detection device according to claim 1, characterized in that: The partial discharge detection unit (2) comprises a housing (21) and a detection probe (22).

3. The partial discharge detection device according to claim 2, characterized in that: One end of the housing (21) is arranged at one end of the test cylinder (1); and the detection probe (22) is arranged at the other end of the housing (21).

4. The partial discharge detection device according to claim 3, characterized in that: A telescopic spring (23) is provided between one end of the housing (21) and the testing cylinder (1).

5. The partial discharge detection device according to claim 1, characterized in that: A rack (31) is provided on the base (3).

6. The partial discharge detection device according to claim 5, characterized in that: It also includes a driving assembly (4); the driving assembly (4) includes a fixing frame (41), a motor (42) and a gear (43).

7. The partial discharge detection device according to claim 6, characterized in that: The fixing frame (41) is arranged at the other end of the testing cylinder (1).

8. The partial discharge detection device according to claim 7, characterized in that: The motor (42) is fixed on the fixing frame (41), and the gear (43) is arranged at the output end of the motor (42); the gear (43) and the rack (31) are arranged opposite to each other.

9. The partial discharge detection device according to claim 8, characterized in that: The base (3) also includes a front limit switch (32) and a rear limit switch (33).

10. A partial discharge detection method, which uses the partial discharge detection device according to any one of claims 1 to 9 to perform partial discharge detection on an electrical appliance to be detected.

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